The hardpan layer prominent at Tucson is not well developed. The winter annuals and the larger shrubs and cacti are absent. Most of the plants are perennial herbs. The root systems generally penetrate ...

Changes in root architecture, induction of root-based transport systems and associations with beneficial soil microorganisms allow plants to maintain optimal nutrient content in the face of ...

This gave the concrete the right level of porosity to wick water and nutrients through it and allow plant roots to spread. Researchers tested the growth of tomatoes, radishes, and romaine lettuce ...